Battery Pack Temperature Sensor Placement for Max-Min Thermal Detection
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Solution Overview
Problem
The use of multiple temperature sensors in battery packs to detect maximum and minimum temperatures increases costs, as each battery cell requires a sensor, which is inefficient and costly.
Innovation Solution
A battery pack design utilizing a first temperature sensor at the central battery cell to detect maximum temperature and a second sensor at an end battery cell to detect minimum temperature, minimizing the number of sensors required while effectively protecting the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is attached to each battery cell to detect maximum and minimum temperatures, then temperature detection accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts temperature sensors from every battery cell position and concentrates them only at critical locations (center and ends). This selective extraction maintains sufficient temperature monitoring capability while reducing the total number of sensors from N (where N is the number of battery cells) to just 2 sensors, thereby resolving the contradiction between detection accuracy and manufacturing cost.
Solution Approach 2:
The patent applies local quality by placing temperature sensors at specific strategic locations (center and end positions) rather than uniformly across all battery cells. The center position detects maximum temperature where heat accumulates, while end positions detect minimum temperature, creating a non-uniform but optimized sensor distribution that balances detection accuracy with cost reduction.
2Reliability
If multiple temperature sensors are arranged according to battery cell locations, then temperature monitoring coverage is improved, but device complexity increases
Solution Approach 1:
The patent extracts unnecessary temperature sensors from non-critical battery cell positions and retains only essential sensors at the center and end positions. This reduction from comprehensive coverage to strategic point monitoring maintains reliability for safety-critical temperature detection while significantly simplifying the device structure and reducing complexity.
Solution Approach 2:
The temperature sensors at the center and end positions serve multiple functions: the center sensor detects maximum temperature for overheating prevention, while end sensors detect minimum temperature for cooling assessment. This multi-functional placement allows two sensors to perform what would otherwise require multiple sensors, reducing complexity while maintaining monitoring coverage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient temperature detection of both maximum and minimum temperatures with only two sensors, reducing costs and ensuring effective temperature protection of the battery pack.
Implementation Method 1
a first temperature sensor attached to, among the plurality of battery cells, a central battery cell that is placed at a center in the first direction
Implementation Method 2
a second temperature sensor attached to, among the plurality of battery cells, an end battery cell that is placed at one end portion in the first direction
Data Source
AI summary
A battery pack has a temperature detection unit that detects the temperature of a battery cell. The temperature detection unit is provided with a first temperature sensor that is attached to a central battery cell disposed at the center in a first direction among a plurality of battery cells, and a second temperature sensor that is attached to an end battery cell disposed at one end in the first direction among the plurality of battery cells. No temperature sensor is attached to an end battery cell disposed at the other end in the first direction among the plurality of battery cells.